Caterpillar C18 Diesel Engine

Arrangement No. 237-1955

General

• Manufacturer: Caterpillar

• Engine Model: C18

• Arrangement Number: 237-1955

• Engine Type: Inline 6-cylinder, 4-stroke diesel

• Aspiration: Turbocharged & aftercooled

• Fuel System: Electronic Unit Injection (ACERT)

• Engine Management: CAT ADEM ECM

• Application: Industrial / oilfield pump & power drive

• Duty Rating: Continuous heavy-duty service

Performance (Typical for Arr. 237-1955)

(Exact rating depends on ECM program and rating class)

• Rated Power: 575 – 700 HP

• Rated Speed: 1,800 – 2,100 RPM

• Peak Torque: ~2,200 – 2,600 lb-ft

• Torque Rise: ~30%

Common Oilfield Ratings

• 600 HP @ 1,800 RPM

• 700 HP @ 2,100 RPM

Engine Specifications

• Displacement: 1,106 in³ (18.1 L)

• Bore: 5.7 in (145 mm)

• Stroke: 7.2 in (183 mm)

• Compression Ratio: ~16.0:1

• Firing Order: 1-5-3-6-2-4

• Rotation: Counterclockwise (flywheel end)

Cooling & Lubrication

• Cooling: Jacket water cooled

• Lubrication: Full-pressure system

• Oil Capacity: ~13 – 15 gallons

• Oil Filtration: Full-flow & bypass filters